INCLINING EXPERIMENT RESULTS:
26 m TRAWLER
By Mazlan Muslim, BSc, MEng
UniKL MIMET
Owner : Asas Ombak Sdn Bhd
[Koperasi Pembangunan Rakyat Pahang Berhad for new
vessels]
Type : Trawler
GRT : + 95 (Based on Fisheries Dept. Rules)
LOA : 27.0 m
LBP : 23.8 m
B mld : 6.00 m
D mld : 2.5 m
T designed : 1.9 m
Freeboard Summer : 0.60 m
Gearbox Ratio : 7.5:1
Classification : China Classification Society
Main Engine : Cummins KTA 19-M3 500 hp
Auxiliary Engine : 250 hp
Generating Set : Cummins 50 kW x 1
V Trawl : Up to 5 knots
V Design : Up to 12 knots
: 171 MT
RECORD OF INCLINING TEST
Port : MSB (Majuikan Sdn Bhd) Complex, Kuantan, Pahang
Wind : Light Breeze
Water : Calm
S.g. of Water : 1.02 t/m3
T Aft : 2.45 m
T Fwd : 1.49 m
T Mean : 1.97 m
Shift of Inclining Wts. : 4.80 m
No. of Move Weight Moved (T) Direction Pendulum Deflection (deg.)
1 0.70 Port-Stbd 0.85
2 1.40 Port-Stbd 1.46
3 - Stbd-Port 0
4 0.70 Stbd-Port 1.26
5 1.40 Stbd-Port 1.34
6 - Port-Stbd 0
The average inclining in deg. was obtained for a movement of w (i.e. 0.7 T) through 4.8m. As w is moved across the deck the CG of the ship moves from G to G1 such that
Wh = x GG1
where
= Displacement of vessel in T
The centre of buoyancy B was originally under G, but it will move to B1 to be in the same vertical line as G1.
GG1 is parallel to the movement of w and since
Angle MGG1 = 900
GG1 = GM tan
Therefore wh = GM tan
GM = wh/ tan
= (0.7 x 4.8)/(166.03 x tan1.260)
= 0.92 m
SOUNDING & QUANTITIES
Tank No. Type of Tanks Quantity (T)
1 Fresh Water (FW) 8.00
2 Fuel Oil (FO) 2.67
FW Tanks : 5.4 m x 1.0 m Athwartships
FO Tanks : 6.0 m x 3.5 m Athwartships
After the value of GM had been calculated for the ship in the inclined condition a correction may be made for the presence of free surfaces in double-bottom or other tanks. The presence of free surfaces – the value of GM by an amount:
GG1 = (I x i)/( x s)
where
GG1 = the amount by which the CG of the ship is raised due to the presence of
each free surface;
i.e. the amount by which GM is reduced since M (metacentre) is constant.
I = the transverse moment of inertia of the free surface about its own centre
line;
= Vol. of disp. of ship;
i = density of liquid with free surface;
s = density of water in which the ship floats.
LIGHTSHIP FROM RESULTS OF INCLINING TEST
Item Tonnes VCG (m) Vert. Mom. (T.m) LCG (m) Moment (T.m)
Aft
Fwd
To come off:
Inclining weights 2.80 3.00 8.4 0.7 Aft 1.96
FW Tanks 8.00 1.60 12.8 6.6 Fwd 52.8
FO Tanks 2.67 0.23 0.614 0.37 Fwd 0.99
Men, tools, gear, staging 0.50 3.30 1.65 2.00 Aft 1.00
Total Off 13.97 23.46
As inclined 180.0
Lightship 166.03
T mean (1.97 m)
Centre of flotation
Free surface correction 0.114 m
T Fwd 1.49 m
T Aft 2.45 m
Khasiat Fadhilat (Isnad) Doa Haikal - Majmu' Syarif
Inilah khasiat fadhilat Doa Haikal yakni 7 doa drp no. 1 sampai no. 7 & sampai "Qul a'uuzubirabbinnaas" bahawasanya adalah diriwayatkan oleh Nabi kita Muhammad SAW pd suatu hari sedang Nabi kita SAW duduk di dalam Masjid Madinah maka Jibrail AS pun datang membawa firman ujarnya, "Ya Rasulullah SAW salam Allah SWT pd tuan hamba & firmannya, 'Hai kekasihku adapun doa ini yakni 7 doa ini dihantarkan Tuhan pd tuan hamba maka barangsiapa tiada percaya akan doa ini kafirlah ia & barangsiapa membaca dia atau menyimpan dia maka Allah SWT melepaskan dia & ibubapanya drpd api neraka ya Muhammad barangsiapa menaruh doa ini di dlm rumahnya maka tiada boleh masuk jin & syaitan ke dlm rumahnya itu ya Muhammad barangsiapa suratkan doa ini & dipakai diperbuat tangkal nescaya terlepaslah ia drpd azab sengsara & wabak & duduk itu dlm aman & lagi barangsiapa menaruh doa ini sentiasalah ia dihormati orang & termulialah ia pd orang banyak &
Comments